Commit | Line | Data |
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cce9e06d HX |
1 | /* |
2 | * Cryptographic API for algorithms (i.e., low-level API). | |
3 | * | |
4 | * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the Free | |
8 | * Software Foundation; either version 2 of the License, or (at your option) | |
9 | * any later version. | |
10 | * | |
11 | */ | |
12 | #ifndef _CRYPTO_ALGAPI_H | |
13 | #define _CRYPTO_ALGAPI_H | |
14 | ||
15 | #include <linux/crypto.h> | |
b5b7f088 HX |
16 | #include <linux/list.h> |
17 | #include <linux/kernel.h> | |
b6aa63c0 | 18 | #include <linux/skbuff.h> |
cce9e06d | 19 | |
5d1d65f8 | 20 | struct crypto_aead; |
4cc7720c | 21 | struct module; |
ebc610e5 | 22 | struct rtattr; |
e853c3cf HX |
23 | struct seq_file; |
24 | ||
25 | struct crypto_type { | |
27d2a330 | 26 | unsigned int (*ctxsize)(struct crypto_alg *alg, u32 type, u32 mask); |
2ca33da1 | 27 | unsigned int (*extsize)(struct crypto_alg *alg); |
27d2a330 | 28 | int (*init)(struct crypto_tfm *tfm, u32 type, u32 mask); |
2ca33da1 | 29 | int (*init_tfm)(struct crypto_tfm *tfm); |
e853c3cf | 30 | void (*show)(struct seq_file *m, struct crypto_alg *alg); |
b6aa63c0 | 31 | int (*report)(struct sk_buff *skb, struct crypto_alg *alg); |
7b0bac64 HX |
32 | struct crypto_alg *(*lookup)(const char *name, u32 type, u32 mask); |
33 | ||
34 | unsigned int type; | |
35 | unsigned int maskclear; | |
36 | unsigned int maskset; | |
37 | unsigned int tfmsize; | |
e853c3cf | 38 | }; |
4cc7720c HX |
39 | |
40 | struct crypto_instance { | |
41 | struct crypto_alg alg; | |
42 | ||
43 | struct crypto_template *tmpl; | |
44 | struct hlist_node list; | |
45 | ||
46 | void *__ctx[] CRYPTO_MINALIGN_ATTR; | |
47 | }; | |
48 | ||
49 | struct crypto_template { | |
50 | struct list_head list; | |
51 | struct hlist_head instances; | |
52 | struct module *module; | |
53 | ||
ebc610e5 | 54 | struct crypto_instance *(*alloc)(struct rtattr **tb); |
4cc7720c | 55 | void (*free)(struct crypto_instance *inst); |
f2ac72e8 | 56 | int (*create)(struct crypto_template *tmpl, struct rtattr **tb); |
4cc7720c HX |
57 | |
58 | char name[CRYPTO_MAX_ALG_NAME]; | |
59 | }; | |
60 | ||
6bfd4809 HX |
61 | struct crypto_spawn { |
62 | struct list_head list; | |
63 | struct crypto_alg *alg; | |
64 | struct crypto_instance *inst; | |
97eedce1 | 65 | const struct crypto_type *frontend; |
a73e6996 | 66 | u32 mask; |
6bfd4809 HX |
67 | }; |
68 | ||
b5b7f088 HX |
69 | struct crypto_queue { |
70 | struct list_head list; | |
71 | struct list_head *backlog; | |
72 | ||
73 | unsigned int qlen; | |
74 | unsigned int max_qlen; | |
75 | }; | |
76 | ||
5c64097a HX |
77 | struct scatter_walk { |
78 | struct scatterlist *sg; | |
79 | unsigned int offset; | |
80 | }; | |
81 | ||
5cde0af2 HX |
82 | struct blkcipher_walk { |
83 | union { | |
84 | struct { | |
85 | struct page *page; | |
86 | unsigned long offset; | |
87 | } phys; | |
88 | ||
89 | struct { | |
90 | u8 *page; | |
91 | u8 *addr; | |
92 | } virt; | |
93 | } src, dst; | |
94 | ||
95 | struct scatter_walk in; | |
96 | unsigned int nbytes; | |
97 | ||
98 | struct scatter_walk out; | |
99 | unsigned int total; | |
100 | ||
101 | void *page; | |
102 | u8 *buffer; | |
103 | u8 *iv; | |
822be00f | 104 | unsigned int ivsize; |
5cde0af2 HX |
105 | |
106 | int flags; | |
822be00f AB |
107 | unsigned int walk_blocksize; |
108 | unsigned int cipher_blocksize; | |
109 | unsigned int alignmask; | |
5cde0af2 HX |
110 | }; |
111 | ||
bf06099d DM |
112 | struct ablkcipher_walk { |
113 | struct { | |
114 | struct page *page; | |
115 | unsigned int offset; | |
116 | } src, dst; | |
117 | ||
118 | struct scatter_walk in; | |
119 | unsigned int nbytes; | |
120 | struct scatter_walk out; | |
121 | unsigned int total; | |
122 | struct list_head buffers; | |
123 | u8 *iv_buffer; | |
124 | u8 *iv; | |
125 | int flags; | |
126 | unsigned int blocksize; | |
127 | }; | |
128 | ||
b5b7f088 | 129 | extern const struct crypto_type crypto_ablkcipher_type; |
5cde0af2 HX |
130 | extern const struct crypto_type crypto_blkcipher_type; |
131 | ||
db131ef9 HX |
132 | void crypto_mod_put(struct crypto_alg *alg); |
133 | ||
4cc7720c HX |
134 | int crypto_register_template(struct crypto_template *tmpl); |
135 | void crypto_unregister_template(struct crypto_template *tmpl); | |
136 | struct crypto_template *crypto_lookup_template(const char *name); | |
137 | ||
9cd899a3 HX |
138 | int crypto_register_instance(struct crypto_template *tmpl, |
139 | struct crypto_instance *inst); | |
87b16756 | 140 | int crypto_unregister_instance(struct crypto_instance *inst); |
9cd899a3 | 141 | |
6bfd4809 | 142 | int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg, |
a73e6996 | 143 | struct crypto_instance *inst, u32 mask); |
97eedce1 HX |
144 | int crypto_init_spawn2(struct crypto_spawn *spawn, struct crypto_alg *alg, |
145 | struct crypto_instance *inst, | |
146 | const struct crypto_type *frontend); | |
d6ef2f19 HX |
147 | int crypto_grab_spawn(struct crypto_spawn *spawn, const char *name, |
148 | u32 type, u32 mask); | |
97eedce1 | 149 | |
6bfd4809 | 150 | void crypto_drop_spawn(struct crypto_spawn *spawn); |
2e306ee0 HX |
151 | struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn, u32 type, |
152 | u32 mask); | |
97eedce1 | 153 | void *crypto_spawn_tfm2(struct crypto_spawn *spawn); |
6bfd4809 | 154 | |
378f4f51 HX |
155 | static inline void crypto_set_spawn(struct crypto_spawn *spawn, |
156 | struct crypto_instance *inst) | |
157 | { | |
158 | spawn->inst = inst; | |
159 | } | |
160 | ||
ebc610e5 HX |
161 | struct crypto_attr_type *crypto_get_attr_type(struct rtattr **tb); |
162 | int crypto_check_attr_type(struct rtattr **tb, u32 type); | |
68b6c7d6 | 163 | const char *crypto_attr_alg_name(struct rtattr *rta); |
d06854f0 HX |
164 | struct crypto_alg *crypto_attr_alg2(struct rtattr *rta, |
165 | const struct crypto_type *frontend, | |
166 | u32 type, u32 mask); | |
167 | ||
168 | static inline struct crypto_alg *crypto_attr_alg(struct rtattr *rta, | |
169 | u32 type, u32 mask) | |
170 | { | |
171 | return crypto_attr_alg2(rta, NULL, type, mask); | |
172 | } | |
173 | ||
3c09f17c | 174 | int crypto_attr_u32(struct rtattr *rta, u32 *num); |
70ec7bb9 HX |
175 | void *crypto_alloc_instance2(const char *name, struct crypto_alg *alg, |
176 | unsigned int head); | |
7fed0bf2 HX |
177 | struct crypto_instance *crypto_alloc_instance(const char *name, |
178 | struct crypto_alg *alg); | |
179 | ||
b5b7f088 HX |
180 | void crypto_init_queue(struct crypto_queue *queue, unsigned int max_qlen); |
181 | int crypto_enqueue_request(struct crypto_queue *queue, | |
182 | struct crypto_async_request *request); | |
0c7d400f | 183 | void *__crypto_dequeue_request(struct crypto_queue *queue, unsigned int offset); |
b5b7f088 HX |
184 | struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue); |
185 | int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm); | |
186 | ||
7613636d HX |
187 | /* These functions require the input/output to be aligned as u32. */ |
188 | void crypto_inc(u8 *a, unsigned int size); | |
189 | void crypto_xor(u8 *dst, const u8 *src, unsigned int size); | |
190 | ||
5cde0af2 HX |
191 | int blkcipher_walk_done(struct blkcipher_desc *desc, |
192 | struct blkcipher_walk *walk, int err); | |
193 | int blkcipher_walk_virt(struct blkcipher_desc *desc, | |
194 | struct blkcipher_walk *walk); | |
195 | int blkcipher_walk_phys(struct blkcipher_desc *desc, | |
196 | struct blkcipher_walk *walk); | |
7607bd8f HX |
197 | int blkcipher_walk_virt_block(struct blkcipher_desc *desc, |
198 | struct blkcipher_walk *walk, | |
199 | unsigned int blocksize); | |
4f7f1d7c AB |
200 | int blkcipher_aead_walk_virt_block(struct blkcipher_desc *desc, |
201 | struct blkcipher_walk *walk, | |
202 | struct crypto_aead *tfm, | |
203 | unsigned int blocksize); | |
5cde0af2 | 204 | |
bf06099d DM |
205 | int ablkcipher_walk_done(struct ablkcipher_request *req, |
206 | struct ablkcipher_walk *walk, int err); | |
207 | int ablkcipher_walk_phys(struct ablkcipher_request *req, | |
208 | struct ablkcipher_walk *walk); | |
209 | void __ablkcipher_walk_complete(struct ablkcipher_walk *walk); | |
210 | ||
5cde0af2 HX |
211 | static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm) |
212 | { | |
ab300465 HX |
213 | return PTR_ALIGN(crypto_tfm_ctx(tfm), |
214 | crypto_tfm_alg_alignmask(tfm) + 1); | |
5cde0af2 HX |
215 | } |
216 | ||
124b53d0 HX |
217 | static inline struct crypto_instance *crypto_tfm_alg_instance( |
218 | struct crypto_tfm *tfm) | |
219 | { | |
220 | return container_of(tfm->__crt_alg, struct crypto_instance, alg); | |
221 | } | |
222 | ||
4cc7720c HX |
223 | static inline void *crypto_instance_ctx(struct crypto_instance *inst) |
224 | { | |
225 | return inst->__ctx; | |
226 | } | |
227 | ||
b5b7f088 HX |
228 | static inline struct ablkcipher_alg *crypto_ablkcipher_alg( |
229 | struct crypto_ablkcipher *tfm) | |
230 | { | |
231 | return &crypto_ablkcipher_tfm(tfm)->__crt_alg->cra_ablkcipher; | |
232 | } | |
233 | ||
234 | static inline void *crypto_ablkcipher_ctx(struct crypto_ablkcipher *tfm) | |
235 | { | |
236 | return crypto_tfm_ctx(&tfm->base); | |
237 | } | |
238 | ||
aa379a6a SS |
239 | static inline void *crypto_ablkcipher_ctx_aligned(struct crypto_ablkcipher *tfm) |
240 | { | |
241 | return crypto_tfm_ctx_aligned(&tfm->base); | |
242 | } | |
243 | ||
124b53d0 HX |
244 | static inline struct crypto_blkcipher *crypto_spawn_blkcipher( |
245 | struct crypto_spawn *spawn) | |
246 | { | |
247 | u32 type = CRYPTO_ALG_TYPE_BLKCIPHER; | |
332f8840 | 248 | u32 mask = CRYPTO_ALG_TYPE_MASK; |
124b53d0 HX |
249 | |
250 | return __crypto_blkcipher_cast(crypto_spawn_tfm(spawn, type, mask)); | |
251 | } | |
252 | ||
5cde0af2 HX |
253 | static inline void *crypto_blkcipher_ctx(struct crypto_blkcipher *tfm) |
254 | { | |
255 | return crypto_tfm_ctx(&tfm->base); | |
256 | } | |
257 | ||
258 | static inline void *crypto_blkcipher_ctx_aligned(struct crypto_blkcipher *tfm) | |
259 | { | |
260 | return crypto_tfm_ctx_aligned(&tfm->base); | |
261 | } | |
262 | ||
2e306ee0 HX |
263 | static inline struct crypto_cipher *crypto_spawn_cipher( |
264 | struct crypto_spawn *spawn) | |
265 | { | |
266 | u32 type = CRYPTO_ALG_TYPE_CIPHER; | |
267 | u32 mask = CRYPTO_ALG_TYPE_MASK; | |
268 | ||
269 | return __crypto_cipher_cast(crypto_spawn_tfm(spawn, type, mask)); | |
270 | } | |
271 | ||
f28776a3 HX |
272 | static inline struct cipher_alg *crypto_cipher_alg(struct crypto_cipher *tfm) |
273 | { | |
274 | return &crypto_cipher_tfm(tfm)->__crt_alg->cra_cipher; | |
275 | } | |
276 | ||
2e306ee0 HX |
277 | static inline struct crypto_hash *crypto_spawn_hash(struct crypto_spawn *spawn) |
278 | { | |
279 | u32 type = CRYPTO_ALG_TYPE_HASH; | |
280 | u32 mask = CRYPTO_ALG_TYPE_HASH_MASK; | |
281 | ||
282 | return __crypto_hash_cast(crypto_spawn_tfm(spawn, type, mask)); | |
283 | } | |
284 | ||
5f7082ed HX |
285 | static inline void *crypto_hash_ctx(struct crypto_hash *tfm) |
286 | { | |
287 | return crypto_tfm_ctx(&tfm->base); | |
288 | } | |
289 | ||
055bcee3 HX |
290 | static inline void *crypto_hash_ctx_aligned(struct crypto_hash *tfm) |
291 | { | |
292 | return crypto_tfm_ctx_aligned(&tfm->base); | |
293 | } | |
294 | ||
5cde0af2 HX |
295 | static inline void blkcipher_walk_init(struct blkcipher_walk *walk, |
296 | struct scatterlist *dst, | |
297 | struct scatterlist *src, | |
298 | unsigned int nbytes) | |
299 | { | |
300 | walk->in.sg = src; | |
301 | walk->out.sg = dst; | |
302 | walk->total = nbytes; | |
303 | } | |
304 | ||
bf06099d DM |
305 | static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk, |
306 | struct scatterlist *dst, | |
307 | struct scatterlist *src, | |
308 | unsigned int nbytes) | |
309 | { | |
310 | walk->in.sg = src; | |
311 | walk->out.sg = dst; | |
312 | walk->total = nbytes; | |
313 | INIT_LIST_HEAD(&walk->buffers); | |
314 | } | |
315 | ||
316 | static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk) | |
317 | { | |
318 | if (unlikely(!list_empty(&walk->buffers))) | |
319 | __ablkcipher_walk_complete(walk); | |
320 | } | |
321 | ||
b5b7f088 HX |
322 | static inline struct crypto_async_request *crypto_get_backlog( |
323 | struct crypto_queue *queue) | |
324 | { | |
325 | return queue->backlog == &queue->list ? NULL : | |
326 | container_of(queue->backlog, struct crypto_async_request, list); | |
327 | } | |
328 | ||
2de98e75 | 329 | static inline int ablkcipher_enqueue_request(struct crypto_queue *queue, |
b5b7f088 HX |
330 | struct ablkcipher_request *request) |
331 | { | |
2de98e75 | 332 | return crypto_enqueue_request(queue, &request->base); |
b5b7f088 HX |
333 | } |
334 | ||
335 | static inline struct ablkcipher_request *ablkcipher_dequeue_request( | |
2de98e75 | 336 | struct crypto_queue *queue) |
b5b7f088 | 337 | { |
2de98e75 | 338 | return ablkcipher_request_cast(crypto_dequeue_request(queue)); |
b5b7f088 HX |
339 | } |
340 | ||
341 | static inline void *ablkcipher_request_ctx(struct ablkcipher_request *req) | |
342 | { | |
343 | return req->__ctx; | |
344 | } | |
345 | ||
2de98e75 HX |
346 | static inline int ablkcipher_tfm_in_queue(struct crypto_queue *queue, |
347 | struct crypto_ablkcipher *tfm) | |
b5b7f088 | 348 | { |
2de98e75 | 349 | return crypto_tfm_in_queue(queue, crypto_ablkcipher_tfm(tfm)); |
b5b7f088 HX |
350 | } |
351 | ||
3c09f17c HX |
352 | static inline struct crypto_alg *crypto_get_attr_alg(struct rtattr **tb, |
353 | u32 type, u32 mask) | |
354 | { | |
355 | return crypto_attr_alg(tb[1], type, mask); | |
356 | } | |
357 | ||
378f4f51 HX |
358 | /* |
359 | * Returns CRYPTO_ALG_ASYNC if type/mask requires the use of sync algorithms. | |
360 | * Otherwise returns zero. | |
361 | */ | |
362 | static inline int crypto_requires_sync(u32 type, u32 mask) | |
363 | { | |
364 | return (type ^ CRYPTO_ALG_ASYNC) & mask & CRYPTO_ALG_ASYNC; | |
365 | } | |
366 | ||
6bf37e5a JY |
367 | noinline unsigned long __crypto_memneq(const void *a, const void *b, size_t size); |
368 | ||
369 | /** | |
370 | * crypto_memneq - Compare two areas of memory without leaking | |
371 | * timing information. | |
372 | * | |
373 | * @a: One area of memory | |
374 | * @b: Another area of memory | |
375 | * @size: The size of the area. | |
376 | * | |
377 | * Returns 0 when data is equal, 1 otherwise. | |
378 | */ | |
379 | static inline int crypto_memneq(const void *a, const void *b, size_t size) | |
380 | { | |
381 | return __crypto_memneq(a, b, size) != 0UL ? 1 : 0; | |
382 | } | |
cce9e06d | 383 | |
bb55a4c1 MV |
384 | static inline void crypto_yield(u32 flags) |
385 | { | |
386 | if (flags & CRYPTO_TFM_REQ_MAY_SLEEP) | |
387 | cond_resched(); | |
388 | } | |
389 | ||
6bf37e5a | 390 | #endif /* _CRYPTO_ALGAPI_H */ |